Using Energy Management Control Systems for HVAC Operational Diagnostics

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Abstract

The power and flexibility in building energy
management systems (EMS) provide building operators,
system consultants and technicians with a useful tool for
assessing building equipment and system operation. This
paper describes specific methods and techniques for
using the EMS to verify proper equipment operation and
to diagnose operational deficiencies. Two primary
methods are discussed: monitoring using trend logs to
observe performance over time, and functional spot
testing using the EMS. Discussion covers what EMS
points to bend, how to efficiently set up bends, how to
obtain data and what to look for in analyzing the data for
a variety of typical equipment types. Examples and
illustrations are provided.